The Math.PI property represents the ratio of the circumference of a circle to its diameter, approximately 3.14159:

Math.PI=π≈3.14159\mathtt{\mi{Math.PI}} = \pi \approx 3.14159

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Property attributes of Math.PI

Writable

no

Enumerable

no

Configurable

no

Description

Because PI is a static property of Math, you always use it as Math.PI, rather than as a property of a Math object you created (Math is not a constructor).

Examples

Using Math.PI

The following function uses Math.PI to calculate the circumference of a circle with a passed radius.